package cn.edu.scau.cmi.wujiaxian.exercise2;

public class Example2_3 {
	public static void main(String[] args) {
		Teacher teacher = new Teacher();
		Student student = new Student();
		System.out.println("12和236的和:" + teacher.add(12, 236));
		System.out.println("234和120的差:" + teacher.sub(234, 120));
		student.speak();
	}
}
